{
  lib,
  config,
  pkgs,
  ...
}:
with lib; let
  cfg = config.pub-solar;
in {
  options.pub-solar = {
    infra-node = {
      mailing = {
        enabled = mkEnableOption "Whether to enable mailing for services on the host";
        type = mkOption {
          description = "Mail server type";
          type = types.nullOr types.str;
          default = "smtp";
        };
        host = mkOption {
          description = "Mailing server host";
          type = types.nullOr types.str;
          default = null;
        };
        from = mkOption {
          description = "Mailing server from";
          type = types.nullOr types.str;
          default = null;
        };
        user = mkOption {
          description = "Mailing server user";
          type = types.listOf types.str;
          default = [];
        };
        passwordFile = mkOption {
          description = "Mailing server passwordFile";
          type = types.nullOr types.str;
          default = null;
        };
      };
    };
  };
}